[ GLSA 200606-04 ] Tor: Several vulnerabilities

[Sune Kloppenborg Jeppesen <jaervosz () gentoo org>]

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Gentoo Linux Security Advisory                           GLSA 200606-04
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                                            http://security.gentoo.org/
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  Severity: Normal
     Title: Tor: Several vulnerabilities
      Date: June 07, 2006
      Bugs: #134329
        ID: 200606-04

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Synopsis
========

Tor is vulnerable to a possible buffer overflow, a Denial of Service,
information disclosure and information leak.

Background
==========

Tor is an implementation of second generation Onion Routing, a
connection-oriented anonymizing communication service.

Affected packages
=================

    -------------------------------------------------------------------
     Package       /  Vulnerable  /                         Unaffected
    -------------------------------------------------------------------
  1  net-misc/tor     < 0.1.1.20                           >= 0.1.1.20

Description
===========

Some integer overflows exist when adding elements to the smartlists.
Non-printable characters received from the network are not properly
sanitised before being logged. There are additional unspecified bugs in
the directory server and in the internal circuits.

Impact
======

The possible buffer overflow may allow a remote attacker to execute
arbitrary code on the server by sending large inputs. The other
vulnerabilities can lead to a Denial of Service,  a lack of logged
information, or some information disclosure.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All Tor users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=net-misc/tor-0.1.1.20"

References
==========

  [ 1 ] CVE-2006-0414
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-0414
  [ 2 ] Tor ChangeLog
        http://tor.eff.org/cvs/tor/ChangeLog

Availability
============

This GLSA and any updates to it are available for viewing at
the Gentoo Security Website:

  http://security.gentoo.org/glsa/glsa-200606-04.xml

Concerns?
=========

Security is a primary focus of Gentoo Linux and ensuring the
confidentiality and security of our users machines is of utmost
importance to us. Any security concerns should be addressed to
security () gentoo org or alternatively, you may file a bug at
http://bugs.gentoo.org.

License
=======

Copyright 2006 Gentoo Foundation, Inc; referenced text
belongs to its owner(s).

The contents of this document are licensed under the
Creative Commons - Attribution / Share Alike license.

http://creativecommons.org/licenses/by-sa/2.5

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